/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench/geo2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:13:05,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:13:05,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:13:05,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:13:05,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:13:05,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:13:05,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:13:05,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:13:05,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:13:05,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:13:05,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:13:05,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:13:05,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:13:05,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:13:05,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:13:05,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:13:05,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:13:05,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:13:05,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:13:05,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:13:05,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:13:05,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:13:05,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:13:05,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:13:05,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:13:05,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:13:05,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:13:05,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:13:05,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:13:05,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:13:05,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:13:05,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:13:05,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:13:05,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:13:05,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:13:05,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:13:05,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:13:05,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:13:05,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:13:05,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:13:05,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:13:05,905 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:13:05,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:13:05,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:13:05,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:13:05,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:13:05,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:13:05,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:13:05,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:13:05,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:13:05,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:13:05,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:13:05,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:13:05,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:13:05,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:13:05,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:13:05,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:13:05,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:13:05,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:13:05,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:13:05,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:13:05,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:13:05,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:13:06,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:13:06,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:13:06,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:13:06,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:13:06,297 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:13:06,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/geo2-ll.c [2021-01-06 17:13:06,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4c85f5c4a/6ebac3db7b7c4e809b0061d2913be6e0/FLAG7067579ba [2021-01-06 17:13:06,955 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:13:06,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c [2021-01-06 17:13:06,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4c85f5c4a/6ebac3db7b7c4e809b0061d2913be6e0/FLAG7067579ba [2021-01-06 17:13:07,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4c85f5c4a/6ebac3db7b7c4e809b0061d2913be6e0 [2021-01-06 17:13:07,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:13:07,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:13:07,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:13:07,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:13:07,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:13:07,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e74340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07, skipping insertion in model container [2021-01-06 17:13:07,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:13:07,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:13:07,615 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:13:07,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:13:07,651 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:13:07,666 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/geo2-ll.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:13:07,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:13:07,703 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:13:07,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07 WrapperNode [2021-01-06 17:13:07,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:13:07,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:13:07,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:13:07,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:13:07,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:13:07,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:13:07,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:13:07,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:13:07,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... [2021-01-06 17:13:07,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:13:07,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:13:07,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:13:07,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:13:07,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:13:07,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:13:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:13:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:13:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:13:08,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:13:08,143 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 17:13:08,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:13:08 BoogieIcfgContainer [2021-01-06 17:13:08,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:13:08,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:13:08,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:13:08,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:13:08,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:13:07" (1/3) ... [2021-01-06 17:13:08,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40794442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:13:08, skipping insertion in model container [2021-01-06 17:13:08,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:13:07" (2/3) ... [2021-01-06 17:13:08,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40794442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:13:08, skipping insertion in model container [2021-01-06 17:13:08,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:13:08" (3/3) ... [2021-01-06 17:13:08,154 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll.c [2021-01-06 17:13:08,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:13:08,166 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:13:08,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:13:08,256 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:13:08,257 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:13:08,257 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:13:08,257 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:13:08,257 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:13:08,257 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:13:08,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:13:08,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:13:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 17:13:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 17:13:08,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:13:08,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 17:13:08,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:13:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:13:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-01-06 17:13:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:13:08,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069767544] [2021-01-06 17:13:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:13:08,416 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:13:08,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051280585] [2021-01-06 17:13:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:13:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:13:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:13:08,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:13:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:13:08,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069767544] [2021-01-06 17:13:08,570 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:13:08,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051280585] [2021-01-06 17:13:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:13:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:13:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14436919] [2021-01-06 17:13:08,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:13:08,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:13:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:13:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:13:08,602 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2021-01-06 17:13:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:13:08,686 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-01-06 17:13:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:13:08,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-01-06 17:13:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:13:08,709 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:13:08,710 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:13:08,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:13:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:13:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 17:13:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 17:13:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 17:13:08,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2021-01-06 17:13:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:13:08,803 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 17:13:08,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:13:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 17:13:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:13:08,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:13:08,806 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:13:09,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 17:13:09,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:13:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:13:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash 300806046, now seen corresponding path program 1 times [2021-01-06 17:13:09,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:13:09,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921734739] [2021-01-06 17:13:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:13:09,059 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:13:09,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775622500] [2021-01-06 17:13:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:13:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:13:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:13:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:13:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:13:09,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921734739] [2021-01-06 17:13:09,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:13:09,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775622500] [2021-01-06 17:13:09,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:13:09,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:13:09,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010892251] [2021-01-06 17:13:09,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:13:09,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:13:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:13:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:13:09,252 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2021-01-06 17:13:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:13:09,338 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 17:13:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:13:09,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 17:13:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:13:09,340 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:13:09,340 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:13:09,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:13:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:13:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 17:13:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:13:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 17:13:09,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2021-01-06 17:13:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:13:09,354 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 17:13:09,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:13:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 17:13:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 17:13:09,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:13:09,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2021-01-06 17:13:09,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:13:09,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:13:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:13:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2016063466, now seen corresponding path program 2 times [2021-01-06 17:13:09,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:13:09,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721752330] [2021-01-06 17:13:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:13:09,597 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:13:09,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423329198] [2021-01-06 17:13:09,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:13:09,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:13:09,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:13:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:13:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:13:13,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:13:13,935 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:13:13,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:13:15,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:13:16,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:13:33,024 WARN L197 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:13:44,563 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1)))))) is different from false [2021-01-06 17:13:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:13:44,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721752330] [2021-01-06 17:13:44,574 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:13:44,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423329198] [2021-01-06 17:13:44,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:13:44,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:13:44,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121566401] [2021-01-06 17:13:44,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:13:44,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:13:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:13:44,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=4, NotChecked=16, Total=110 [2021-01-06 17:13:44,577 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2021-01-06 17:14:08,992 WARN L197 SmtUtils]: Spent 12.29 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:14:20,519 WARN L197 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 39 DAG size of output: 13 [2021-01-06 17:14:46,200 WARN L197 SmtUtils]: Spent 20.41 s on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 17:15:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:34,262 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-01-06 17:15:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:15:34,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2021-01-06 17:15:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:34,266 INFO L225 Difference]: With dead ends: 27 [2021-01-06 17:15:34,266 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:15:34,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=45, Invalid=136, Unknown=5, NotChecked=24, Total=210 [2021-01-06 17:15:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:15:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-01-06 17:15:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:15:34,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 17:15:34,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 11 [2021-01-06 17:15:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:34,274 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 17:15:34,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:15:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 17:15:34,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:15:34,275 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:34,275 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:34,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:34,476 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash -271065837, now seen corresponding path program 1 times [2021-01-06 17:15:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:34,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305451753] [2021-01-06 17:15:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:34,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686555929] [2021-01-06 17:15:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:15:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:15:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305451753] [2021-01-06 17:15:34,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686555929] [2021-01-06 17:15:34,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:34,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:15:34,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279916619] [2021-01-06 17:15:34,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:15:34,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:15:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:15:34,691 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2021-01-06 17:15:38,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:38,842 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-01-06 17:15:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:15:38,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 17:15:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:38,844 INFO L225 Difference]: With dead ends: 19 [2021-01-06 17:15:38,844 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:15:38,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:15:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:15:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 17:15:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:15:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 17:15:38,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 14 [2021-01-06 17:15:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:38,851 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 17:15:38,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:15:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 17:15:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:15:38,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:38,852 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2021-01-06 17:15:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:39,053 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -271025122, now seen corresponding path program 3 times [2021-01-06 17:15:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476038287] [2021-01-06 17:15:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:39,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:39,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177284010] [2021-01-06 17:15:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true